SCIENCE IN PICS: Mars Valleys Molded by Volcanic FiresSurface polygons and spiral coils in the Athabasca Valles prove this network of valleys near the Mars’ equator was forged by lava, according to a study published in Science on April 27.Friends Read FreeCopyFacebookXTruthGettrLinkedInTelegramEmailSaveLava coil on the surface of the 1974 Hawaiian pahoehoe lava flow. (Image courtesy of NASA/JPL/University of Arizona)By Belinda McCallum4/26/2012Updated: 9/29/2015Print